The potential of a mesophilic–thermophilic–mesophilic anaerobic digestion system was investigated with respect to improvement of both digestion and sanitation efficiencies during treatment of liquid cattle manure. The pilot plant produced a high methane yield from liquid dairy cattle manure of 0.24 m3 (kg VSfed)−1. Considering the low system loading rate of 1.4–1.5 kg VS (m3 d)−1, digestion efficiency compared to conventional processes did not appear improved. The minimum guaranteed retention time in the tubular thermophilic reactor was increased compared to a continuously stirred tank reactor. Levels of intestinal enterococci in raw liquid manure as determined with cultivation methods were reduced by 2.5–3 log units to a level of around 102 cfu/mL. This sanitizing effect was achieved both during mesophilic–thermophilic–mesophilic and thermophilic–mesophilic treatment, provided the thermophilic digester was operated at 53–55°C. A change in feeding interval from 1 h to 4 h did not significantly alter methane yield and sanitation efficiency. It was proposed that a two-stage, thermophilic–mesophilic anaerobic digestion system would be able to achieve the same sanitizing effect and equal or better digestion efficiency at lower costs.
Skip Nav Destination
Article navigation
Research Article|
April 01 2006
Mesophilic–thermophilic–mesophilic anaerobic digestion of liquid dairy cattle manure Available to Purchase
M. Effenberger;
M. Effenberger
*Bavarian State Research Center for Agriculture, Institute of Agricultural Engineering, Farm Buildings and Environmental Technology, Voettinger Str. 36, 85354 Freising, Germany
Search for other works by this author on:
J. Bachmaier;
J. Bachmaier
*Bavarian State Research Center for Agriculture, Institute of Agricultural Engineering, Farm Buildings and Environmental Technology, Voettinger Str. 36, 85354 Freising, Germany
Search for other works by this author on:
G. Garcés;
G. Garcés
**Institute of Water Quality Control and Waste Management, TU Munich, Garching, Germany
Search for other works by this author on:
A. Gronauer;
A. Gronauer
*Bavarian State Research Center for Agriculture, Institute of Agricultural Engineering, Farm Buildings and Environmental Technology, Voettinger Str. 36, 85354 Freising, Germany
Search for other works by this author on:
P.A. Wilderer;
P.A. Wilderer
**Institute of Water Quality Control and Waste Management, TU Munich, Garching, Germany
Search for other works by this author on:
M. Lebuhn
M. Lebuhn
**Institute of Water Quality Control and Waste Management, TU Munich, Garching, Germany
Search for other works by this author on:
Water Sci Technol (2006) 53 (8): 253–261.
Citation
M. Effenberger, J. Bachmaier, G. Garcés, A. Gronauer, P.A. Wilderer, M. Lebuhn; Mesophilic–thermophilic–mesophilic anaerobic digestion of liquid dairy cattle manure. Water Sci Technol 1 April 2006; 53 (8): 253–261. doi: https://doi.org/10.2166/wst.2006.256
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00